Amplifier



FIG. 1 is a front-left perspective view of an amplifier, showing my newdesign;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The material shown in broken lines is for illustrative purposes only andforms no part of the claimed design.

CLAIM The ornamental design for an amplifier, as shown and described.